I decided to sell what I thought was my 3 1/4 X 4 1/4 ancient, battlescarred Graflex, but when I got it out of the closet to get all the info so I could offer it on eBay, I was surprised. It's a Compact, with a 3 1/4 X 5 1/2 image size.
Lens is an f:4.5 Bausch & Lomb Tessar. No focal length. I just says "5X7," which is what -- 8 1/2 inches or so?

What a strange concept. It has no tripod mount on the bottom, but one on the side, which would make it useful for portraits -- if you didn't mind your subject upside down AND backwards! (Maybe it had a ground glass for the back at one time, but there's nothing there now.)

What's with the format? The camera has a film pack adapter in the proper size, which indicates to me that it was possible at one time to buy film packs in that size. Must've been somewhat popular, but for what? Panoramas? Were there regular holders or cut film magazines in this size as well? Maybe some sort of roll film lash-up?

Anyone have suggestions on where I could go to learn more about this old girl? I'm really intrigued.

The 3-1/4 x 5-1/2 size is postcard size. You could take photos with this camera and have contact prints made on postcard-size paper. Polaroid did the same thing a generation later. The Compact was also made in 5x7. The B&L 5x7 lens is 7.5 inches, and is the one listed in my catalogue for your camera.

A Review of Graflex by Richard P. Paine shows that the 3 1/4 x 5 1/2 Compact Graflex was made from 1915 to 1924 and the 5x7 Compact Graflex from 1915 to 1925. The 3 1/4 x 5 1/2 with the B&L Zeiss Tessar Ser 1c f4.5 sold for $120 new. It has a fixed Graflex back. Ground glass for the film plane was an accessory for Graflex SLR cameras. The serial number will be on the lip of the view hood opening (early Graflex) or stamped on the view hood lid behind the view hood close to the clamp that holds the view hood to the lid._________________The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.